Electric controlling mechanism for elevators



2 Sheets-Sneet 1.

(No Model.)

W. E. NICKERSON. ELECTRIC CONTROLLING MECHANISM FOR ELEVATORS.

Patented May 14, 1889.

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W. E. NIOKERSON. ELECTRIC CONTROLLING MECHANISM FOR ELEVATORS.

No. 403,442. Patented May 14, 1889.

, when the elevator-carriage is ascending.

UNITED STATES PATENT OFFICE.

\VILLIAM E. NICKERSON, OF CAMBRIDGE, MASSACHUSETTS.

ELECTRIC CONTROLLING MECHANISM FOR ELEVATORS.

SPECIFICATION forming part of Letters Patent No. 403,442, dated May 14,1889.

Application filed March 9, 1889- Serial No, 302,709. (No model.)

To aZZ 107mm it may cancer/t.-

Be it known that I, )VILLIAM EMERY NICK- ERSON, of Cambridge, in thecounty of Middlesex and State of Massachusetts, have invented certainnew and useful Improvements in Electrical Controlling Mechanism forElevators, of which the following, taken in connect-ion with theaccompanying drawings, is a specification.

My invention consists in placing upon the walls of an elevator-wellswitch-plates in circuits and in connecting to the carriage anindex-electrode to be operated by the attendant and to be so made andarranged that it can be set to cause a break in the circuit at anydesired floor, so that the attendant can control the motion of thecarriage by simply turning the index-electrode.

My invention is shown in the accompanying drawings, in which- Figure 1is a view in vertical section showing the well-room of an elevator, theelevatorcarriage, electric devices, and. parts of the electric circuitsand fixed circuit-breakers. Fig. 2 is a diagraminatical view showing theelectric circuit and switch system. Fig. 3 is a vertical section showinga cam for contact-breaking and an index-electrode attached to it andalso indexed contact-plates. Inthis figure the cam is represented as notbeing at any of the fixed switch-plates, Fig. at is a view similar to Fi3, except that the cam for circuit-breaking is in an acting position andin contact with one of the push-plates F of a circuitbreaker. Fig. 5shows a part of the elevatorwell wall and a part of the carriage-walland one of the indexed contact-plates in horizontal section, alsoshowing the contact-breaking cam and the index-electrode.

In Fig. 1, A represents the elevat0r-' .vell room, 0 the carriage, and Othe hoisting-rope.

U U represent an electric device used for controlling the mechanism thatcauses the carriage to ascend, and D D the electric device used forcontrolling the mechanism that causes the carriage to descend.

Eis a cable containing the wires for making the various circuits betweenthe electric devices, the switch-box E, and the circuitbreakers.

One set of circuit-breakers, a U a U a" U a U is shown in Fig. 1. Thisset is used The circuit-breaker d D, Fig. 1, belongs to the set ofcircuitbreakers that is used when the carriage is coming down.

For convenience of referencel have shown two sets of circuit-breakersand the connection with the electric device and switch-box in a singlediagram, Fig.

The switch-box E is shown enlarged in Figs. 3 an d i. This box containsthe circuit-breaking cam T and an index-electrode, T for operatin g thecam T. The cam T rotates on a center, 1, Figs. 1, 2, 5, and 1. Attachedto the switch-box are contact-plates H and L. The contactplate H is usedwhen the carriage is going up, and has numbers at each division or markindicating the place to put the indexelectrode T for stopping at thedesired floor. The contact-plate L is used for going down, and is markedin the same manner as the plate H.

The arrangement of circuits is shown in Fig. 2. The up-going circuitconsists of the wire U leading from the electric device U U to thecircuit-breaker plate U thence (supposing that all of thecircuit-breakers are closed, as shown in the diagram) through the platea and its wire to the next breaker, U u, and so on through all of thisseries of breakers to the wire L", and through it to the contact-plateH; thence by the index-electrode T (if it is in contact) to the wire Tand back to the electric device U U. The down-going circuit consists ofthe wire D leading from the electric device D D to the circuit-breaker Dthence through the plate d and its wire to the circuit-breaker D" d, andso on through all of the circuit=breakers, through the wire D to thecontact-plate L, and then through the index -electrode T (if it is incontact) to the wire T, and back to the electric device D D.

It will he observed that the breakers each have a cam-shaped push-plate,F, and a pushpin, S, and that the projections of these pushplatesvary-that is, the series for going up increases in projection from thesecond floor to the last, and vice versa, for the comingdown series.

The operation of the abovewlescriloed device is as follows: If wesuppose the carriage at the bottom and the index-electrode T oninsulation, as shown in Fig. 3, then there will be no movement. To startthe carriage the attendant turns the index-electrode '1 onto thecontact-plate H. This act will make a circuit through the wires U T,&c., to the electric device U U and start the carriage upward. Thecarriage will continue to ascend until the cam contact-breaker T engageswith one of the circuit-breakers-for instance, the one at the fourthfloor, u U, Fig. 1and by pressing back the push-plate F and pin S breaksthe circuit and stops the carriage. The cam T is so made that itsprojection from the carriage depends upon the angle at which theindex-electrode T stands, its greater projection being when theindexelectrode stands horizontally, as shown in Fig. 3, and theprojection is less and less as the index-electrode is turned in adirection either up or down from the horizontal, and as the push-platesF of the circuit-breakers stand at different degrees of projection fromthe walls of the well-room it is evident that if the cam T is so turnedas to project but little then it will not act on a push-plate F unlessthat plate projects toa comparatively greater distance from the walls ofthe wellroom, so that the position of the index-electrode T and the camT determines at which circuit-breaker the breaking of the circuit willtake place, (and consequently at which floor.

The numerals 2, 3, 4, and 5 on the contactplate H indicate at whatposition the indexelectrode T is to be placed for stopping the carriageat any desired floor, (when going up,) and the numerals 4, 3, 2, and 1on the contactplate L indicate at what position the indexelectrode T isto be placed for stopping the carriage at any desired floor when goingdown.

I have shown my invention in use when it is desirable to have two seriesof circuitbreakers, one to be used in ascending and one in descending,so arranged that the attendant can set the index-electrode for stoppingat any floor either in going up or down. A simpler device, or ratherarrangement, can be made with but one set of circuit-breakers, in whichcase the attendant would be obliged to set the index-electrode justbefore he reaches the floor at which he desires to stop.

My invention is involved, primarily, in the single circuit-breakingdevice shown in Fig. 4, consisting in the circuit-breaking plates U 2L4,a transmitting mechanism like S F, and the cam T, in connection withelectric circuits and electric devices.

I claim- 1. In an electrically-controlled elevator, the combination of afixed automaticallyoperated circuit-breaker with an adjustable cam, anindex electrode, and connectingcircuits and electric devices,substantially as and for the purpose set forth.

2. In an electrically-controlled elevator, the combination of a seriesof fixed circuit-breakers in the Well-room, one for each floor, with anelevatoncarriage having an adjustable cam adapted to operate thecircuit-breakers, an index-electrode, and connecting-circuits andelectric devices, substantially as and for the purpose set forth.

3. In an e1ectrically-controlled elevator, the combination of a seriesof circuit-breakers adapted for each floor by having different degreesof projections, as described, with an adjust-able contact-breaker in theelevatorcarriage operating in connection with circuits and electricdevices, substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, on this 8th day of March, A. D.1889.

IVILLIAM E. NICKERSON.

Witnesses:

FRANK G. PARKER, WILLIAM H. PARRY.

